Beta-5 Division

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The Beta-5 Division is a cell of the Office of Naval Intelligence's Section Three. Like its parent section, the Beta-5 Division is often responsible for the development and application of top-secret, morally questionable projects. The cell is so secretive that few UNSC personnel, including those within ONI, are aware of its existence.[1][2]


The Beta-5 Division was charged with operating the SPARTAN-III program prior to the implementation of the Spartan branch, though many SPARTAN-IIIs were placed under the operational command of other services.[3][4][5] The Beta-5 Division also operates the Asymmetrical Action Group, which was created late in the Human-Covenant War in order to disrupt, disarm, and dissolve Covenant operations. Though the group was initially composed of unconventional warfare veterans, it eventually recruited Spartans into its ranks; the Beta-5 Division contracted Chalybs Defense Solutions to create a specialized MJOLNIR variant for the AAG's Spartan operators.[2][6] Beta-5 also operated the Ferret program overseen by Rear Admiral Serin Osman.[7][8]

The helmet used by Beta-5 security forces, which is derived from the standard CH252 helmet, is a shared asset among the branches of the UNSC and has also been adopted as a MJOLNIR variant.[6]

The Beta-5 Division possesses extremely sophisticated decryption facilities.[9]

By December 2553, prior to her ascension to the role of CINCONI, Rear Admiral Serin Osman served as the head of the Beta-5 Division.[8] Dr. Henry Glassman was integrated into Beta-5's experimental research group for his work in astrophysics and quantum theory.[10]

Operational history[edit]

During the Battle of Earth, Doctor Veronica Clayton interrogated Frederic-104, questioning his decisions during the defense of Reach, suggesting that his mistakes had damaged the Spartans' ability to adequately defend the planet. The interrogation was interrupted by a furious Fleet Admiral Hood, and over her protests that he had no authority over Beta-5 protocol he ordered Blue Team to deploy to Earth's surface to take part in operations.[11]

In 2552 prior to the destruction of SWORD Base, the Beta-5 Division recovered Dr. Catherine Halsey's personal journal and immediately declared it top secret.

Two months after the New Phoenix Incident and Cortana's supposed death, a Beta-5 operative known as Sapphire Three interviewed John-117 regarding his interactions with the AI in late 2552.[12]

During the Created uprising, Bets-5 operatives testing the STREET VIPER-class Mjolnir on Earth were methodically hunted down and killed by the Created.[13]

At somepoint, the Beta-5 operative who possessed the journal, as well as several artifacts pertaining to Spartan NOBLE Team, died; one of this operative's subordinates sent these contents in January 2610 to his cousin, a fellow Beta-5 operative. He warned his cousin about the dangers that possessing the artifacts could cause, as some individuals within Beta-5 Division would be willing to kill to keep their existence a secret.[14][15][16]

List of appearances[edit]


  1. ^ Halo: Ghosts of Onyx, page ??
  2. ^ a b Halo: The Essential Visual Guide, page 133
  3. ^ Halo: Reach
  4. ^ Noble Team performance reports
  5. ^ Halo: The Essential Visual Guide, pages 29, 62, 101, 103-105, 130, 139, 165
  6. ^ a b Halo: Reach - The Armory
  7. ^ Halo: Fractures, "A Necessary Truth" ("In fact, Serin Osman—the ONI admiral in charge of the Ferret program—was so concerned about the situation that she had warned Veta they might need to rethink building the team around Spartans.")
  8. ^ a b Halo: Retribution, Chapter 2 ("Osman was the current head of the Beta-5 Division of Section Three operations, which ran the SPARTAN programs and most of ONI’s other black ops...")
  9. ^ Halo: The Fall of Reach, page 55
  10. ^ Halo 4: The Essential Visual Guide, page 25
  11. ^ Halo: First Strike, 2010 Edition
  12. ^ Halo Legendary Crate, Data Drop #9
  13. ^ Halo Infinite, Armor Hall: Street Viper - Helmet Description "The Created were methodical in tracking down all known examples of STREET VIPER on Earth, eliminating each prototype and their Beta-5 testers, then wiping all records of its existence. The remaining helmets are now under close re-evaluation."
  14. ^ Halo: Reach Legendary Edition - journal classification seal
  15. ^ Halo: Reach Legendary Edition - package contents letter
  16. ^ Halo: Reach Legendary Edition - journal note

See also[edit]